US6232498B1ExpiredUtility

Process for the preparation of benzothiazolone compounds

22
Assignee: ASTRA ZENECA UK LTDPriority: Jan 30, 1998Filed: Oct 1, 1999Granted: May 15, 2001
Est. expiryJan 30, 2018(expired)· nominal 20-yr term from priority
Inventors:Christopher Goodwin
C07C 233/36C07C 335/20C07D 277/68C07C 233/18C07D 277/82C07C 335/26
22
PatentIndex Score
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Cited by
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References
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Claims

Abstract

There are described processes for the preparation of a compound of formula I and novel intermediates in the preparative process.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. A compound of formula X                    
       wherein Y is H and X is selected from the group consisting of NO 2 , NH 2 -HCl, NH—CS—NHCOPh and NH—CS—NH 2 , or X and Y together form a five-membered ring, as in formula II                    
       or as in formula III                    
     
     
       2. A compound of formula V:

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